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Infections and Bacterial Resistance · Journal article
Microorganisms · September 9, 2026
Early or partial results. Treat as a signal, not a conclusion.
This is a single case report documenting the first documented infection caused by Pantoea piersonii in China, arising from a totally implantable venous access port in an immunocompromised patient with lung cancer. The patient recovered following device removal and antimicrobial therapy, but the report provides no generalizable data on epidemiology, treatment efficacy, or outcomes.
Single case report with microbiological and genomic characterization. 49-year-old immunocompromised woman with lung cancer and totally implantable venous access port.. Intervention: Complete device removal and empirical antimicrobial therapy. China.
Pantoea piersonii isolated from purulent discharge from venous access port site in 49-year-old woman with lung cancer Pathogen identified by MALDI-TOF MS and confirmed by whole-genome sequencing with ANI analysis and phylogenomic reconstruction Isolate exhibited broad antimicrobial susceptibility to tested agents
Safety was not reported in the material analysed. Check the source before drawing any conclusion about harm.
This case documents an exceptionally rare pathogen in a device-related infection setting. Clinicians should remain alert to environmental Gram-negative bacteria in immunocompromised patients with indwelling devices, but no specific clinical recommendations or incidence data can be derived from a single case.
Single case report with clinical and microbiological characterization; documents first documented infection in China but provides no comparative data, controlled outcomes, or generalizable evidence.
As stated by the source record.
Quoted from the source exactly as published.
This case documents an exceptionally rare pathogen in a device-related infection setting. Clinicians should remain alert to environmental Gram-negative bacteria in immunocompromised patients with indwelling devices, but no specific clinical recommendations or incidence data can be derived from a single case.
Graded across the dimensions that decide whether you should act, each from what the source actually supports. There is no single score, and where a dimension was not assessed it says so.
Pantoea piersonii (formerly Kalamiella piersonii) is a recently reclassified environmental Gram-negative bacterium belonging to the family Erwiniaceae. Human infections caused by this organism are extremely rare. Here, we report a rare case of implantable venous access port-associated soft tissue infection caused by P. piersonii in a 49-year-old immunocompromised woman with lung cancer. The pathogen was isolated from purulent discharge obtained from the port site and identified by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS). Whole-genome sequencing confirmed species-level identification based on average nucleotide identity (ANI) analysis and phylogenomic reconstruction. The isolate exhibited broad antimicrobial susceptibility to the tested agents. Following complete device removal and empirical antimicrobial therapy, the patient recovered uneventfully. This study reports the first documented case of P. piersonii infection in China and provides a comprehensive clinical and genomic characterization of a newly isolated clinical strain.
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